The two meter hair respectively connected potentiometer center head and two fixed end in either end, slowly turn the potentiometer handle, make its from an extreme position rotation to another extreme position, normal potentiometer, the resistance value indicated by multimer needle should be nominal resistance value (or 0Ω) continuous change to 0 (or nominal resistance value). The whole process of rotation, the hand should be smooth change, and there should be no pulsating phenomenon. If in the process of adjusting the resistance value, the meter hand pulsating phenomenon, it shows that the potentiometer has bad contact fault. The detection method of straight slide potentiometer is the same as this. With switch potentiometer detection, for the potentiometer with switch, in addition to the above method should be detected potentiometer nominal resistance and contact, but also should detect the switch is normal.
For wireline potentiometers and linear potentiometers, resolution is expressed as a percentage of the total resistance to the change in resistance caused by each turn of the moving contact in the winding. For potentiometers with functional characteristics, because the resistance of each turn on the winding is different, resolution is a variable. At this point, the potentiometer resolution generally refers to the average resolution of the maximum slope section of the function characteristic curve. Potentiometer sliding noise is the unique noise of potentiometer. When changing the resistance value, due to the improper distribution of potentiometer resistance, rotating system with improper and potentiometer contact resistance and other reasons, will make the moving contact in the resistance body surface movement, the output end in addition to a useful signal, but also accompanied by the signal fluctuation noise.
Coaxial potentiometer is a kind of potentiometer
The electric parameter of potentiometer choice
Logarithmic or index type potentiometer
Double coaxial potentiometer of stereo audio amplifier
The detection method of potentiometer